The target minimum number of 100 patients per diagnostic label (asthma or COPD), physician-assessed severity level and country has been chosen to support many basic local reimbursement specific requirements with reasonable precision, and to provide large sample size for scientific questions applicable across severities and countries. Therefore, considering the targeted countries, it is estimated that approximately 7,700 patients with asthma and 7,100 patients with COPD will be enrolled.